window.addEventListener('load', function() {
	var username = document.querySelector('.username')
	var psds = document.querySelector('.psds')
	username.onfocus = function() {
		if (username.value == "邮箱/用户名/手机号") {
			username.value = ''
		}
	}
	username.onblur = function() {
		if (username.value == '') {
			username.value = "邮箱/用户名/手机号"
		}
	}
	
	psds.onfocus = function() {
		if (psds.value == "请输入密码") {
			psds.value = ''
		}
	}
	psds.onblur = function() {
		if (psds.value == '') {
			psds.value = "请输入密码"
		}
	}



})
